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Finding the Fourth Proportional to 1,672.83, 2,309.12 and 974.21

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Solution

The fourth proportional to 1,672.83, 2,309.12 and 974.21 is: 1,344.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,672.83 : 2,309.12 = 974.21 : x
  2. Step 2: Convert to fraction form
    1,672.83/2,309.12 = 974.21/x
  3. Step 3: Cross multiply
    1,672.83x = 2,309.12 × 974.21
  4. Step 4: Simplify right side
    1,672.83x = 2,249,567.80
  5. Step 5: Solve for x
    x = 2,249,567.80/1,672.83
  6. Step 6: Final answer
    x = 1,344.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.